[MERGE] Move the notes on writing tests out of HACKING into a new file, and improve them.

[Robert Collins]

On Wed, 2008-08-13 at 21:48 -0500, John Arbash Meinel wrote:

> I would like to say that all tests should pass on all platforms for every
> commit to mainline. But I get the feeling that is a bit onerous.

I don't think its very onerous if the infrastructure is there to support
it. You need clear reporting, and a test <thing> people can get at to
debug on.

back in baz days we built 32 bit and 64 bit, LSB and MSB machine
binaries and ran the test suite on all of them for every test; found
lots of bugs.

As far as getting everything passing again being a blocker to having PQM
lock-step test, I don't think it is - we can decorate the current set of
failures fairly easily and new commits would only fail on new problems -
letting the win32 interested parties whittle the test suite down.

-Rob
-- 
GPG key available at: <http://www.robertcollins.net/keys.txt>.
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